MushroomPriceIndex

Paddy Straw: what do the growing supplies cost?

Paddy Straw supplies are sold in 3 product categories (liquid culture, agar & lab, substrate & amendments) across 1 US vendors — 3 listings tracked, 3 in stock, updated September 4, 2026. Prices below are grouped by category because a grow kit, a bag of spawn and a culture syringe are different products; comparing them against each other would be misleading.

Liquid culture

Cheapest today
$12.73/syringe
Median
$12.73/syringe
Highest today
$12.73/syringe
In stock now
1
VendorListing Per syringeListing price Stock
Out-Grow Paddy Straw (Volvariella Volvacea) Liquid Culture Syringe $12.73 $12.73 in stock view →

Price history — liquid culture (daily median)

$12.33$12.54$12.76Jul 20: $12.36Jul 21: $12.36Jul 22: $12.36Jul 23: $12.36Jul 24: $12.36Jul 25: $12.36Jul 26: $12.36Jul 27: $12.36Jul 28: $12.36Jul 29: $12.36Jul 30: $12.36Jul 31: $12.36Aug 1: $12.36Aug 2: $12.36Aug 3: $12.36Aug 4: $12.36Aug 5: $12.36Aug 7: $12.36Aug 8: $12.36Aug 9: $12.36Aug 10: $12.36Aug 11: $12.36Aug 12: $12.36Aug 13: $12.36Aug 14: $12.36Aug 15: $12.36Aug 16: $12.36Aug 17: $12.73Aug 18: $12.73Aug 19: $12.73Aug 20: $12.73Aug 21: $12.73Aug 22: $12.73Aug 23: $12.73Aug 24: $12.73Aug 25: $12.73Aug 26: $12.73Aug 27: $12.73Aug 28: $12.73Aug 29: $12.73Aug 30: $12.73Aug 31: $12.73Sep 1: $12.73Sep 2: $12.73Sep 3: $12.73Sep 4: $12.73Jul 20Sep 4

Agar & lab

Cheapest today
$26.47/plate
Median
$26.47/plate
Highest today
$26.47/plate
In stock now
1
VendorListing Per plateListing price Stock
Out-Grow Paddy Straw (Volvariella Volvacea) Mushroom Plate Culture $26.47 $26.47 in stock view →

Price history — agar & lab (daily median)

$25.64$26.09$26.53Jul 20: $25.70Jul 21: $25.70Jul 22: $25.70Jul 23: $25.70Jul 24: $25.70Jul 25: $25.70Jul 26: $25.70Jul 27: $25.70Jul 28: $25.70Jul 29: $25.70Jul 30: $25.70Jul 31: $25.70Aug 1: $25.70Aug 2: $25.70Aug 3: $25.70Aug 4: $25.70Aug 5: $25.70Aug 7: $25.70Aug 8: $25.70Aug 9: $25.70Aug 10: $25.70Aug 11: $25.70Aug 12: $25.70Aug 13: $25.70Aug 14: $25.70Aug 15: $25.70Aug 16: $25.70Aug 17: $25.70Aug 18: $26.47Aug 19: $26.47Aug 20: $26.47Aug 21: $26.47Aug 22: $26.47Aug 23: $26.47Aug 24: $26.47Aug 25: $26.47Aug 26: $26.47Aug 27: $26.47Aug 28: $26.47Aug 29: $26.47Aug 30: $26.47Aug 31: $26.47Sep 1: $26.47Sep 2: $26.47Sep 3: $26.47Sep 4: $26.47Jul 20Sep 4

Substrate & amendments

Cheapest today
$19.95/bag
Median
$19.95/bag
Highest today
$19.95/bag
In stock now
1
VendorListing Per bagListing price Stock
Out-Grow 50/50 Horse Manure and Straw Mushroom Substrate (5lb Bag) $19.95 $19.95 in stock view →

Price history — substrate & amendments (daily median)

$19.47$19.81$20.16Jul 20: $19.52Jul 21: $19.52Jul 22: $19.52Jul 23: $19.52Jul 24: $19.52Jul 25: $19.52Jul 26: $19.52Jul 27: $19.52Jul 28: $19.52Jul 29: $19.52Jul 30: $19.52Jul 31: $19.52Aug 1: $19.52Aug 2: $19.52Aug 3: $19.52Aug 4: $19.52Aug 5: $19.52Aug 7: $19.52Aug 8: $19.52Aug 9: $19.52Aug 10: $19.52Aug 11: $19.52Aug 12: $19.52Aug 13: $19.52Aug 14: $19.52Aug 15: $19.52Aug 16: $19.52Aug 17: $20.11Aug 18: $20.11Aug 19: $19.95Aug 20: $19.95Aug 21: $19.95Aug 22: $19.95Aug 23: $19.95Aug 24: $19.95Aug 25: $19.95Aug 26: $19.95Aug 27: $19.95Aug 28: $19.95Aug 29: $19.95Aug 30: $19.95Aug 31: $19.95Sep 1: $19.95Sep 2: $19.95Sep 3: $19.95Sep 4: $19.95Jul 20Sep 4

We check Paddy Straw supply prices at every vendor we track, every day. How the index works · All categories · All tracked species